According to Christian Examiner:
GLADD-handing is a common political occurrence in Washington, D.C., but the official guest list for Pope Francis’ visit to the White House is causing the Vatican serious concern.
According to the Wall Street Journal, Vatican officials are concerned that photos featuring the pope greeting several prominent gay rights advocates and Roman Catholics who support same-sex marriage during his White House visit could be misinterpreted as the pontiff endorsing non-traditional views on the family and human sexuality.
According to the White House, retired (and now divorced) homosexual Episcopal Bishop V. Gene Robinson will be a guest, as will Nicholas Coppola, a former Roman Catholic who started a Change.org petition calling for the church to be more inclusive of gays and lesbians after he was put out of his church parish in New York.